<template>
  <div class="home">
    <header class="home-header wrap" :class="{'active': headerScroll}">
      <router-link to="./category">
        <i class="iconfont icon-menu"></i>
      </router-link>
      <div class="header-search">
        <span class="app-name">新峰商城</span>
        <i class="iconfont icon-search"></i>
        <router-link class="search-title" to="./search">我的商城</router-link>
      </div>
      <router-link class="login" tag="span" to="/login" v-if="!isLogin">登录</router-link>
      <router-link class="login" tag="span" to="/user" v-else>
        <i class="iconfont icon-Serviceusers"></i>
      </router-link>
    </header>

    <nav-bar :isLogin="isLogin"></nav-bar>
    <Swiper :list="swiperList" />
    <div class="category-list">
      <div v-for="item in categoryList" :key="item.categoryId">
        <img :src="item.imgUrl" alt />
        <span>{{ item.name }}</span>
      </div>
    </div>

    <goods-list :goodsList="newGoodses" :title="'新品上线'"></goods-list>
    <goods-list :goodsList="hotGoodses" :title="'热门商品'"></goods-list>
    <goods-list :goodsList="recommendGoodses" :title="'最新推荐'"></goods-list>
  </div>
</template>

<script>
import { reactive, toRefs } from '@vue/reactivity'
import { nextTick, onMounted, onBeforeMount} from 'vue'
import { getLocal } from '../common/js/utils'
import NavBar from '@/components/NavBar'
import Swiper from '@/components/Swiper'
import { getHome } from '@/service/home'
import GoodsList from '@/components/GoodsList'

export default {
  setup() { // beforeCreate
    const state = reactive({
      isLogin: false,
      swiperList: [],
      categoryList: [
        {
          name: '新蜂超市',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E8%B6%85%E5%B8%82%402x.png',
          categoryId: 100001
        }, {
          name: '新蜂服饰',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E6%9C%8D%E9%A5%B0%402x.png',
          categoryId: 100003
        }, {
          name: '全球购',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%85%A8%E7%90%83%E8%B4%AD%402x.png',
          categoryId: 100002
        }, {
          name: '新蜂生鲜',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E7%94%9F%E9%B2%9C%402x.png',
          categoryId: 100004
        }, {
          name: '新蜂到家',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%88%B0%E5%AE%B6%402x.png',
          categoryId: 100005
        }, {
          name: '充值缴费',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%85%85%E5%80%BC%402x.png',
          categoryId: 100006
        }, {
          name: '9.9元拼',
          imgUrl: 'https://s.yezgea02.com/1604041127880/9.9%402x.png',
          categoryId: 100007
        }, {
          name: '领劵',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E9%A2%86%E5%88%B8%402x.png',
          categoryId: 100008
        }, {
          name: '省钱',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E7%9C%81%E9%92%B1%402x.png',
          categoryId: 100009
        }, {
          name: '全部',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%85%A8%E9%83%A8%402x.png',
          categoryId: 100010
        }
      ],
      newGoodses: [],
      hotGoodses: [],
      recommendGoodses: [],
      headerScroll: false
    })

    onBeforeMount(() => { // 保证父组件已经取到了数组，Nav子组件能用上
      const token = getLocal('token')
      if (token) {
        state.isLogin = true
      }
      
    })

    // 监听页面滚动  --- 页面加载完成才执行
    nextTick(() => {
      window.addEventListener('scroll', () => {
        let scrollTop = window.pageXOffset || document.documentElement.scrollTop || document.body.scrollTop
        console.log(scrollTop);
        state.headerScroll = scrollTop > 100 ? true : false
      }, true)
    })
    

    onMounted(async () => {
      const { data } = await getHome()
      // console.log(data);
      state.swiperList = data.carousels
      state.newGoodses = data.newGoodses
      state.hotGoodses = data.hotGoodses
      state.recommendGoodses = data.recommendGoodses
    })

    return {
      ...toRefs(state)
    }
  },
  components: {
    NavBar,
    Swiper,
    GoodsList
  }
}
</script>

<style lang="less" scoped>
@import "../common/style/mixin";
.home {
  padding-bottom: 100px;
}
.home-header {
  position: fixed;
  left: 0;
  top: 0;
  .wh(100%, 50px);
  .fj();
  line-height: 50px;
  padding: 0 15px;
  .boxSizing();
  font-size: 15px;
  color: #fff;
  z-index: 10000;
  .nbmenu2 {
    color: @primary;
  }
  &.active {
    background: @primary;
    .nbmenu2 {
      color: #fff;
    }
    .login {
      color: #fff;
    }
  }

  .header-search {
    display: flex;
    .wh(74%, 20px);
    line-height: 20px;
    margin: 10px 0;
    padding: 5px 0;
    color: #232326;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    .app-name {
      padding: 0 10px;
      color: @primary;
      font-size: 20px;
      font-weight: bold;
      border-right: 1px solid #666;
    }
    .icon-search {
      padding: 0 10px;
      font-size: 17px;
    }
    .search-title {
      font-size: 12px;
      color: #666;
      line-height: 21px;
    }
  }
  .icon-iconyonghu {
    color: #fff;
    font-size: 22px;
  }
  .login {
    color: @primary;
    line-height: 52px;
    .van-icon-manager-o {
      font-size: 20px;
      vertical-align: -3px;
    }
  }
}
.category-list {
  display: flex;
  flex-shrink: 0;
  flex-wrap: wrap;
  width: 100%;
  padding-bottom: 13px;
  div {
    display: flex;
    flex-direction: column;
    width: 20%;
    text-align: center;
    img {
      .wh(36px, 36px);
      margin: 13px auto 8px auto;
    }
  }
}
.good {
  .good-header {
    background: #f9f9f9;
    height: 50px;
    line-height: 50px;
    text-align: center;
    color: @primary;
    font-size: 16px;
    font-weight: 500;
  }
  .good-box {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    .good-item {
      box-sizing: border-box;
      width: 50%;
      border-bottom: 1px solid #e9e9e9;
      padding: 10px 10px;
      img {
        display: block;
        width: 120px;
        margin: 0 auto;
      }
      .good-desc {
        text-align: center;
        font-size: 14px;
        padding: 10px 0;
        .title {
          color: #222333;
        }
        .price {
          color: @primary;
        }
      }
      &:nth-child(2n + 1) {
        border-right: 1px solid #e9e9e9;
      }
    }
  }
}
.floor-list {
  width: 100%;
  padding-bottom: 50px;
  .floor-head {
    width: 100%;
    height: 40px;
    background: #f6f6f6;
  }
  .floor-content {
    display: flex;
    flex-shrink: 0;
    flex-wrap: wrap;
    width: 100%;
    .boxSizing();
    .floor-category {
      width: 50%;
      padding: 10px;
      border-right: 1px solid #dcdcdc;
      border-bottom: 1px solid #dcdcdc;
      .boxSizing();
      &:nth-child(2n) {
        border-right: none;
      }
      p {
        font-size: 17px;
        color: #333;
        &:nth-child(2) {
          padding: 5px 0;
          font-size: 13px;
          color: @primary;
        }
      }
      .floor-products {
        .fj();
        width: 100%;
        img {
          .wh(65px, 65px);
        }
      }
    }
  }
}
</style>